<?php
// Include the navigation menu
include 'menu.inc';

////////////////////////////// Task 3a: String Functions//////////////////////////
echo "<h2>Task 3a: String Functions</h2>";

// Reverse a string
$word = "Kgonagalo";
$reversed = strrev($word);
echo "Original: $word<br>";
echo "Reversed: $reversed<br><br>";

// Convert string to lowercase
$greeting = "KGONAGALO!";
$lowercase = strtolower($greeting);
echo "Original: $greeting<br>";
echo "Lowercase: $lowercase<br><br>";

// Calculate length of a sentence
$sentence = "Kgonagalo is the Son of Kgalema!";
$length = strlen($sentence);
echo "Sentence: "$sentence"<br>";
echo "Length: $length characters<br><br>";

// Split a CSV string into an array
$csv = "Mogau,Kgonagalo,Kgalemelo,Kgalema";
$names = explode(",", $csv);
echo "Names:<br>";
foreach ($names as $name) {
    echo "- $name<br>";
}
echo "<br>";

// Repeat a pattern multiple times
$pattern = "K";
$repeated = str_repeat($pattern, 10);
echo "Repeated pattern: $repeated<br>";

////////////////////////////// Task 3b: Date and Time//////////////////////////
echo "<h2>Task 3b: Date and Time</h2>";

// Get current date and time details
$currentDate = new DateTime();
$year = $currentDate->format('Y');
$month = $currentDate->format('m');
$dayOfWeek = $currentDate->format('l');
$weekNumber = $currentDate->format('W');

// Calculate days until Christmas 2025
$christmas = new DateTime('2025-12-25');
$interval = $currentDate->diff($christmas);
$daysToChristmas = $interval->days;

echo "Year: $year<br>";
echo "Month: $month<br>";
echo "Day of the Week: $dayOfWeek<br>";
echo "Week Number of the Year: $weekNumber<br>";
echo "Days to Christmas (25-Dec-2025): $daysToChristmas<br>";

//////////////////////////////Task 3c: SADC Countries Array//////////////////////////
echo "<h2>Task 3c: SADC Countries</h2>";

// Define an array of SADC countries
$sadcCountries = [
    "Angola",
    "Botswana",
    "Democratic Republic of Congo",
    "Eswatini",
    "Lesotho",
    "Madagascar",
    "Malawi",
    "Mauritius",
    "Mozambique",
    "Namibia",
    "South Africa",
    "Tanzania",
    "Zambia",
    "Zimbabwe"
];

// Display original list
echo "Original List of SADC Countries:<br>";
foreach ($sadcCountries as $country) {
    echo "$country<br>";
}

// Sort and display in descending order
rsort($sadcCountries);
echo "<br>SADC Countries in Descending Order (Z to A):<br>";
foreach ($sadcCountries as $country) {
    echo "$country<br>";
}

////////////////////////////// Task 3d: Country Capital Lookup//////////////////////////
echo "<h2>Task 3d: SADC Country Capitals</h2>";

// Check if a country was selected from the form
if ($_SERVER["REQUEST_METHOD"] == "GET" && isset($_GET['country']) && $_GET['country'] != "") {
    $country = $_GET['country'];

    // Define capital cities for selected countries
    $capitals = [
        "Angola" => "Luanda",
        "Botswana" => "Gaborone",
        "DRC" => "Kinshasa",
        "Eswatini" => "Mbabane",
        "Lesotho" => "Maseru",
        "Madagascar" => "Antananarivo",
        "Malawi" => "Lilongwe",
        "Mozambique" => "Maputo",
        "Namibia" => "Windhoek",
        "South Africa" => "Pretoria"
    ];

    // Lookup and display capital
    $capital = $capitals[$country] ?? "Unknown";
    echo "<p><strong>Capital of $country:</strong> $capital</p>";
}
?>